[GSBN] Decrement factor of SB walls

[valentina maini]

Hi Martin,
I have this data of static calculation of summer performance we made with a not dynamic software... that says that hours of delay of heat weave and reduction of the heat weave in a straw wall with 4,5 cm clay inside and 3,5 lime outside..and 35 straw on hedge.
Delay of 14,1 hours reduction of wave peak 98%...very good results indeed especially for summer climate...
Tha calculation uses official data for energetic certification in italy.... i applied that for spain...
warm wishes, valentina





 www.valentinamaini.net





El 29/11/2011, a las 03:43, martin hammer escribió:

> Thanks very much Jorge, David, Laura, and Bohdan,
> 
> Very helpful.  I will study it all further.
> 
> Decrementally yours,
> 
> Martin
> 
> 
> On 11/28/11 2:55 PM, "David Eisenberg" <strawnet at aol.com> wrote:
> 
>> Ken, Polly Cooper and Jennifer Rennick's chapter that John mention's in that Wiley book - Alternative Construction: Contemporary Natural Building Methods, has a lot of information on this though they don't use the term "decrement." They talk about this issue with straw and other types of wall systems and go into considerable detail. I would get in touch with them and see what they have to say. 
>> 
>> David Eisenberg
>>  
>>  
>> -----Original Message-----
>> From: Laura Bartels <laura at greenweaverinc.com>
>> To: Global Straw Building Network <GSBN at sustainablesources.com>
>> Sent: Mon, Nov 28, 2011 3:40 pm
>> Subject: Re: [GSBN] Decrement factor of SB walls
>> 
>> Hi Martin, 
>> Without going back to the details, I could be mistaken, but it seems that a study by Ken Haggard a while back addressed this or similar properties. I found reference in a GSBN email from '07- see below. Is this the same metric?
>> 
>> Laura
>> 
>> 
>> John,
>> 
>> There is that chapter from Ken Haggard and Polly Cooper on Natural
>> Conditioning in the book Alternative Construction where they look at
>> this. I was looking at it just recently for some curriculum development.
>> 
>> Laura
>> 
>> John Swearingen wrote:
>> 
>>> Very interesting paper, and well written.  Some time ago I remember hearing
>>> someone toss out some similar observations about thermal storage, that on a
>>> diurnal cycle, plaster is activated to a depth of about 2-3 inches
>>> (5cm -7.5cm).  I have always figured that the exceptional thermal
>>> performance of
>>> straw bale buildings is not due solely to the high R-value.  The broad
>>> thermal mass of the plastered walls, readily available to indoor air for
>>> heat exchange, modulates temperatures like my pink Cadillac modulates bumps
>>> in the road.
>>> 
>>> Does anyone know of research and measurements of short and medium thermal
>>> storage in walls?
>>> 
>>> John "Diurnally Yours" Swearingen
>> 
>> 
>> 
>> Laura Bartels
>> GreenWeaver Inc.
>> 520 S. Third St., Suite 5 
>> Carbondale, CO 81623
>> 970-379-6779
>> www.greenweaverinc.com <http://www.greenweaverinc.com> 
>> 
>> 
>> <image.jpg>
>> 
>> 
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>> A community place promoting inspiration, sustainability and creative exchange
>>> 
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